obob's post in Disable Active Noise Cancellation was marked as the answer
It looks like you have done some nice work figuring out things.
I use google to search this site, not this site's search.
I found the following link with a google search "fordcmaxhybridforum active noise cancel"
Maybe this will help
http://fordcmaxhybridforum.com/topic/6669-how-to-quick-and-easy-reversible-anc-delete/
as far as " My Ford dealer says they have never heard of such a thing" this forum is a better source of information for some things.
